Update dependencies from https://github.com/dotnet/arcade build 20190904.31 (#26526)

- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19454.31
- Microsoft.DotNet.Build.Tasks.Feed - 2.2.0-beta.19454.31
- Microsoft.DotNet.Build.Tasks.Packaging - 1.0.0-beta.19454.31
- Microsoft.DotNet.Helix.Sdk - 2.0.0-beta.19454.31

14 files changed, 500 insertions, 136 deletions

diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 950af1337d..ead373581b 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -2,21 +2,21 @@
   <ProductDependencies>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.19453.5">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.19454.31">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>6e94f0da0f12c7663ab39ce5bd6a67c4ab58b5ee</Sha>
+      <Sha>00d8aa82b488f321204a0e69a81399af9df276a1</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="2.0.0-beta.19453.5">
+    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="2.0.0-beta.19454.31">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>6e94f0da0f12c7663ab39ce5bd6a67c4ab58b5ee</Sha>
+      <Sha>00d8aa82b488f321204a0e69a81399af9df276a1</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.Feed" Version="2.2.0-beta.19453.5">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.Feed" Version="2.2.0-beta.19454.31">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>6e94f0da0f12c7663ab39ce5bd6a67c4ab58b5ee</Sha>
+      <Sha>00d8aa82b488f321204a0e69a81399af9df276a1</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.Packaging" Version="1.0.0-beta.19453.5">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.Packaging" Version="1.0.0-beta.19454.31">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>6e94f0da0f12c7663ab39ce5bd6a67c4ab58b5ee</Sha>
+      <Sha>00d8aa82b488f321204a0e69a81399af9df276a1</Sha>
     </Dependency>
     <Dependency Name="Microsoft.Private.CoreFx.NETCoreApp" Version="4.6.0-rc1.19454.13">
       <Uri>https://github.com/dotnet/corefx</Uri>
diff --git a/eng/Versions.props b/eng/Versions.props
index 42f002ea0a..8ef72ccdf6 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -15,8 +15,8 @@
     <UsingToolXliff>false</UsingToolXliff>
     <!-- Package versions -->
     <!-- arcade -->
-    <MicrosoftDotNetBuildTasksFeedVersion>2.2.0-beta.19453.5</MicrosoftDotNetBuildTasksFeedVersion>
-    <MicrosoftDotNetBuildTasksPackagingVersion>1.0.0-beta.19453.5</MicrosoftDotNetBuildTasksPackagingVersion>
+    <MicrosoftDotNetBuildTasksFeedVersion>2.2.0-beta.19454.31</MicrosoftDotNetBuildTasksFeedVersion>
+    <MicrosoftDotNetBuildTasksPackagingVersion>1.0.0-beta.19454.31</MicrosoftDotNetBuildTasksPackagingVersion>
     <MicrosoftDotNetXUnitConsoleRunnerVersion>2.5.1-beta.19278.1</MicrosoftDotNetXUnitConsoleRunnerVersion>
     <!-- roslyn -->
     <MicrosoftNetCompilersToolsetVersion>3.3.0-beta2-19367-02</MicrosoftNetCompilersToolsetVersion>
diff --git a/eng/common/sdl/execute-all-sdl-tools.ps1 b/eng/common/sdl/execute-all-sdl-tools.ps1
index fa239484f2..01799d63ff 100644
--- a/eng/common/sdl/execute-all-sdl-tools.ps1
+++ b/eng/common/sdl/execute-all-sdl-tools.ps1
@@ -45,6 +45,7 @@ if ($GuardianPackageName) {
   $guardianCliLocation = $GuardianCliLocation
 }
 
+$workingDirectory = (Split-Path $SourceDirectory -Parent)
 $ValidPath = Test-Path $guardianCliLocation
 
 if ($ValidPath -eq $False)
@@ -53,13 +54,13 @@ if ($ValidPath -eq $False)
   exit 1
 }
 
-& $(Join-Path $PSScriptRoot "init-sdl.ps1") -GuardianCliLocation $guardianCliLocation -Repository $RepoName -BranchName $BranchName -WorkingDirectory (Split-Path $SourceDirectory -Parent) -AzureDevOpsAccessToken $AzureDevOpsAccessToken -GuardianLoggerLevel $GuardianLoggerLevel
-$gdnFolder = Join-Path (Split-Path $SourceDirectory -Parent) ".gdn"
+& $(Join-Path $PSScriptRoot "init-sdl.ps1") -GuardianCliLocation $guardianCliLocation -Repository $RepoName -BranchName $BranchName -WorkingDirectory $workingDirectory -AzureDevOpsAccessToken $AzureDevOpsAccessToken -GuardianLoggerLevel $GuardianLoggerLevel
+$gdnFolder = Join-Path $workingDirectory ".gdn"
 
 if ($TsaOnboard) {
   if ($TsaCodebaseName -and $TsaNotificationEmail -and $TsaCodebaseAdmin -and $TsaBugAreaPath) {
-    Write-Host "$guardianCliLocation tsa-onboard --codebase-name `"$TsaCodebaseName`" --notification-alias `"$TsaNotificationEmail`" --codebase-admin `"$TsaCodebaseAdmin`" --instance-url `"$TsaInstanceUrl`" --project-name `"$TsaProjectName`" --area-path `"$TsaBugAreaPath`" --iteration-path `"$TsaIterationPath`" --working-directory $ArtifactsDirectory --logger-level $GuardianLoggerLevel"
-    & $guardianCliLocation tsa-onboard --codebase-name "$TsaCodebaseName" --notification-alias "$TsaNotificationEmail" --codebase-admin "$TsaCodebaseAdmin" --instance-url "$TsaInstanceUrl" --project-name "$TsaProjectName" --area-path "$TsaBugAreaPath" --iteration-path "$TsaIterationPath" --working-directory $ArtifactsDirectory --logger-level $GuardianLoggerLevel
+    Write-Host "$guardianCliLocation tsa-onboard --codebase-name `"$TsaCodebaseName`" --notification-alias `"$TsaNotificationEmail`" --codebase-admin `"$TsaCodebaseAdmin`" --instance-url `"$TsaInstanceUrl`" --project-name `"$TsaProjectName`" --area-path `"$TsaBugAreaPath`" --iteration-path `"$TsaIterationPath`" --working-directory $workingDirectory --logger-level $GuardianLoggerLevel"
+    & $guardianCliLocation tsa-onboard --codebase-name "$TsaCodebaseName" --notification-alias "$TsaNotificationEmail" --codebase-admin "$TsaCodebaseAdmin" --instance-url "$TsaInstanceUrl" --project-name "$TsaProjectName" --area-path "$TsaBugAreaPath" --iteration-path "$TsaIterationPath" --working-directory $workingDirectory --logger-level $GuardianLoggerLevel
     if ($LASTEXITCODE -ne 0) {
       Write-Host "Guardian tsa-onboard failed with exit code $LASTEXITCODE."
       exit $LASTEXITCODE
@@ -71,10 +72,10 @@ if ($TsaOnboard) {
 }
 
 if ($ArtifactToolsList -and $ArtifactToolsList.Count -gt 0) {
-  & $(Join-Path $PSScriptRoot "run-sdl.ps1") -GuardianCliLocation $guardianCliLocation -WorkingDirectory $ArtifactsDirectory -TargetDirectory $ArtifactsDirectory -GdnFolder $gdnFolder -ToolsList $ArtifactToolsList -AzureDevOpsAccessToken $AzureDevOpsAccessToken -UpdateBaseline $UpdateBaseline -GuardianLoggerLevel $GuardianLoggerLevel -CrScanAdditionalRunConfigParams $CrScanAdditionalRunConfigParams -PoliCheckAdditionalRunConfigParams $PoliCheckAdditionalRunConfigParams
+  & $(Join-Path $PSScriptRoot "run-sdl.ps1") -GuardianCliLocation $guardianCliLocation -WorkingDirectory $workingDirectory -TargetDirectory $ArtifactsDirectory -GdnFolder $gdnFolder -ToolsList $ArtifactToolsList -AzureDevOpsAccessToken $AzureDevOpsAccessToken -UpdateBaseline $UpdateBaseline -GuardianLoggerLevel $GuardianLoggerLevel -CrScanAdditionalRunConfigParams $CrScanAdditionalRunConfigParams -PoliCheckAdditionalRunConfigParams $PoliCheckAdditionalRunConfigParams
 }
 if ($SourceToolsList -and $SourceToolsList.Count -gt 0) {
-  & $(Join-Path $PSScriptRoot "run-sdl.ps1") -GuardianCliLocation $guardianCliLocation -WorkingDirectory $ArtifactsDirectory -TargetDirectory $SourceDirectory -GdnFolder $gdnFolder -ToolsList $SourceToolsList -AzureDevOpsAccessToken $AzureDevOpsAccessToken -UpdateBaseline $UpdateBaseline -GuardianLoggerLevel $GuardianLoggerLevel -CrScanAdditionalRunConfigParams $CrScanAdditionalRunConfigParams -PoliCheckAdditionalRunConfigParams $PoliCheckAdditionalRunConfigParams
+  & $(Join-Path $PSScriptRoot "run-sdl.ps1") -GuardianCliLocation $guardianCliLocation -WorkingDirectory $workingDirectory -TargetDirectory $SourceDirectory -GdnFolder $gdnFolder -ToolsList $SourceToolsList -AzureDevOpsAccessToken $AzureDevOpsAccessToken -UpdateBaseline $UpdateBaseline -GuardianLoggerLevel $GuardianLoggerLevel -CrScanAdditionalRunConfigParams $CrScanAdditionalRunConfigParams -PoliCheckAdditionalRunConfigParams $PoliCheckAdditionalRunConfigParams
 }
 
 if ($UpdateBaseline) {
@@ -86,8 +87,8 @@ if ($TsaPublish) {
     if (-not $TsaRepositoryName) {
       $TsaRepositoryName = "$($Repository)-$($BranchName)"
     }
-    Write-Host "$guardianCliLocation tsa-publish --all-tools --repository-name `"$TsaRepositoryName`" --branch-name `"$TsaBranchName`" --build-number `"$BuildNumber`" --codebase-name `"$TsaCodebaseName`" --notification-alias `"$TsaNotificationEmail`" --codebase-admin `"$TsaCodebaseAdmin`" --instance-url `"$TsaInstanceUrl`" --project-name `"$TsaProjectName`" --area-path `"$TsaBugAreaPath`" --iteration-path `"$TsaIterationPath`" --working-directory $ArtifactsDirectory --logger-level $GuardianLoggerLevel"
-    & $guardianCliLocation tsa-publish --all-tools --repository-name "$TsaRepositoryName" --branch-name "$TsaBranchName" --build-number "$BuildNumber" --onboard $True --codebase-name "$TsaCodebaseName" --notification-alias "$TsaNotificationEmail" --codebase-admin "$TsaCodebaseAdmin" --instance-url "$TsaInstanceUrl" --project-name "$TsaProjectName" --area-path "$TsaBugAreaPath" --iteration-path "$TsaIterationPath" --working-directory $ArtifactsDirectory  --logger-level $GuardianLoggerLevel
+    Write-Host "$guardianCliLocation tsa-publish --all-tools --repository-name `"$TsaRepositoryName`" --branch-name `"$TsaBranchName`" --build-number `"$BuildNumber`" --codebase-name `"$TsaCodebaseName`" --notification-alias `"$TsaNotificationEmail`" --codebase-admin `"$TsaCodebaseAdmin`" --instance-url `"$TsaInstanceUrl`" --project-name `"$TsaProjectName`" --area-path `"$TsaBugAreaPath`" --iteration-path `"$TsaIterationPath`" --working-directory $workingDirectory --logger-level $GuardianLoggerLevel"
+    & $guardianCliLocation tsa-publish --all-tools --repository-name "$TsaRepositoryName" --branch-name "$TsaBranchName" --build-number "$BuildNumber" --onboard $True --codebase-name "$TsaCodebaseName" --notification-alias "$TsaNotificationEmail" --codebase-admin "$TsaCodebaseAdmin" --instance-url "$TsaInstanceUrl" --project-name "$TsaProjectName" --area-path "$TsaBugAreaPath" --iteration-path "$TsaIterationPath" --working-directory $workingDirectory  --logger-level $GuardianLoggerLevel
     if ($LASTEXITCODE -ne 0) {
       Write-Host "Guardian tsa-publish failed with exit code $LASTEXITCODE."
       exit $LASTEXITCODE
diff --git a/eng/common/templates/post-build/channels/public-dev-release.yml b/eng/common/templates/post-build/channels/netcore-dev-30.yml
index afa9542148..3ce7ce4d6e 100644
--- a/eng/common/templates/post-build/channels/public-dev-release.yml
+++ b/eng/common/templates/post-build/channels/netcore-dev-30.yml
@@ -5,11 +5,11 @@ parameters:
   publishInstallersAndChecksums: false
 
 stages:
-- stage: Publish
+- stage: NetCore_Dev30_Publish
   dependsOn: validate
   variables:
     - template: ../common-variables.yml
-  displayName: Developer Channel
+  displayName: .NET Core 3.0 Dev Publishing
   jobs:
   - template: ../setup-maestro-vars.yml
 
@@ -39,8 +39,8 @@ stages:
         inputs:
           filePath: eng\common\sdk-task.ps1
           arguments: -task PublishToSymbolServers -restore -msbuildEngine dotnet
-            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat) 
-            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat) 
+            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat)
+            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat)
             /p:PDBArtifactsDirectory='$(Build.ArtifactStagingDirectory)/PDBArtifacts/'
             /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
             /p:SymbolPublishingExclusionsFile='$(Build.SourcesDirectory)/eng/SymbolPublishingExclusionsFile.txt'
@@ -85,7 +85,7 @@ stages:
           AZURE_DEVOPS_EXT_PAT: $(dn-bot-dnceng-unviersal-packages-rw)
         inputs:
           filePath: eng\common\sdk-task.ps1
-          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet 
+          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet
             /p:ChannelId=$(PublicDevRelease_30_Channel_Id)
             /p:ArtifactsCategory=$(_DotNetArtifactsCategory)
             /p:IsStableBuild=$(IsStableBuild)
@@ -93,23 +93,23 @@ stages:
             /p:RepositoryName=$(Build.Repository.Name)
             /p:CommitSha=$(Build.SourceVersion)
             /p:NugetPath=$(Agent.BuildDirectory)\Nuget\NuGet.exe
-            /p:AzdoTargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)' 
-            /p:TargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)' 
-            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)' 
-            /p:BARBuildId=$(BARBuildId) 
-            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)' 
-            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)' 
-            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/' 
-            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/' 
-            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)/PackageArtifacts/' 
-            /p:Configuration=Release 
+            /p:AzdoTargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)'
+            /p:TargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)'
+            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)'
+            /p:BARBuildId=$(BARBuildId)
+            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)'
+            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)'
+            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
+            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)/PackageArtifacts/'
+            /p:Configuration=Release
             /p:PublishInstallersAndChecksums=${{ parameters.publishInstallersAndChecksums }}
             /p:InstallersTargetStaticFeed=$(InstallersBlobFeedUrl)
             /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
             /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
             /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
             ${{ parameters.artifactsPublishingAdditionalParameters }}
-        
+
       - task: NuGetCommand@2
         displayName: Publish Packages to AzDO Feed
         condition: contains(variables['TargetAzDOFeed'], 'pkgs.visualstudio.com')
@@ -123,16 +123,16 @@ stages:
         displayName: Publish Blobs to AzDO Feed
         inputs:
           filePath: $(Build.SourcesDirectory)/eng/common/post-build/publish-blobs-to-azdo.ps1
-          arguments: -FeedName $(AzDoFeedName) 
+          arguments: -FeedName $(AzDoFeedName)
             -SourceFolderCollection $(Build.ArtifactStagingDirectory)/BlobArtifacts/
             -PersonalAccessToken $(dn-bot-dnceng-unviersal-packages-rw)
         enabled: false
 
 
-- stage: PublishValidation
-  displayName: Publish Validation
+- stage: NetCore_Dev30_Publish_Validation
+  displayName: .NET Core 3.0 Dev Publish Validation
   variables:
-    - template: ../common-variables.yml  
+    - template: ../common-variables.yml
   jobs:
   - template: ../setup-maestro-vars.yml
 
@@ -160,6 +160,6 @@ stages:
     parameters:
       ChannelId: ${{ variables.PublicDevRelease_30_Channel_Id }}
 
-  - template: ../promote-build.yml	
-    parameters:	
+  - template: ../promote-build.yml
+    parameters:
       ChannelId: ${{ variables.PublicDevRelease_30_Channel_Id }}
diff --git a/eng/common/templates/post-build/channels/netcore-dev-31.yml b/eng/common/templates/post-build/channels/netcore-dev-31.yml
new file mode 100644
index 0000000000..d40aaacc4f
--- /dev/null
+++ b/eng/common/templates/post-build/channels/netcore-dev-31.yml
@@ -0,0 +1,165 @@
+parameters:
+  enableSymbolValidation: true
+  symbolPublishingAdditionalParameters: ''
+  artifactsPublishingAdditionalParameters: ''
+  publishInstallersAndChecksums: false
+
+stages:
+- stage: NetCore_Dev31_Publish
+  dependsOn: validate
+  variables:
+    - template: ../common-variables.yml
+  displayName: .NET Core 3.1 Dev Publishing
+  jobs:
+  - template: ../setup-maestro-vars.yml
+
+  - job:
+    displayName: Symbol Publishing
+    dependsOn: setupMaestroVars
+    condition: contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.PublicDevRelease_31_Channel_Id))
+    variables:
+      - group: DotNet-Symbol-Server-Pats
+    pool:
+      vmImage: 'windows-2019'
+    steps:
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Blob Artifacts
+        inputs:
+          artifactName: 'BlobArtifacts'
+        continueOnError: true
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download PDB Artifacts
+        inputs:
+          artifactName: 'PDBArtifacts'
+        continueOnError: true
+
+      - task: PowerShell@2
+        displayName: Publish
+        inputs:
+          filePath: eng\common\sdk-task.ps1
+          arguments: -task PublishToSymbolServers -restore -msbuildEngine dotnet
+            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat)
+            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat)
+            /p:PDBArtifactsDirectory='$(Build.ArtifactStagingDirectory)/PDBArtifacts/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
+            /p:SymbolPublishingExclusionsFile='$(Build.SourcesDirectory)/eng/SymbolPublishingExclusionsFile.txt'
+            /p:Configuration=Release
+            ${{ parameters.symbolPublishingAdditionalParameters }}
+
+  - job:
+    displayName: Publish Assets
+    dependsOn: setupMaestroVars
+    variables:
+      - group: DotNet-Blob-Feed
+      - group: AzureDevOps-Artifact-Feeds-Pats
+      - name: BARBuildId
+        value: $[ dependencies.setupMaestroVars.outputs['setReleaseVars.BARBuildId'] ]
+      - name: IsStableBuild
+        value: $[ dependencies.setupMaestroVars.outputs['setReleaseVars.IsStableBuild'] ]
+    condition: contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.PublicDevRelease_31_Channel_Id))
+    pool:
+      vmImage: 'windows-2019'
+    steps:
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Package Artifacts
+        inputs:
+          buildType: current
+          artifactName: PackageArtifacts
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Blob Artifacts
+        inputs:
+          buildType: current
+          artifactName: BlobArtifacts
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Asset Manifests
+        inputs:
+          buildType: current
+          artifactName: AssetManifests
+
+      - task: PowerShell@2
+        displayName: Add Assets Location
+        env:
+          AZURE_DEVOPS_EXT_PAT: $(dn-bot-dnceng-unviersal-packages-rw)
+        inputs:
+          filePath: eng\common\sdk-task.ps1
+          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet
+            /p:ChannelId=$(PublicDevRelease_31_Channel_Id)
+            /p:ArtifactsCategory=$(_DotNetArtifactsCategory)
+            /p:IsStableBuild=$(IsStableBuild)
+            /p:IsInternalBuild=$(IsInternalBuild)
+            /p:RepositoryName=$(Build.Repository.Name)
+            /p:CommitSha=$(Build.SourceVersion)
+            /p:NugetPath=$(Agent.BuildDirectory)\Nuget\NuGet.exe
+            /p:AzdoTargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)'
+            /p:TargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)'
+            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)'
+            /p:BARBuildId=$(BARBuildId)
+            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)'
+            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)'
+            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
+            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)/PackageArtifacts/'
+            /p:Configuration=Release
+            /p:PublishInstallersAndChecksums=${{ parameters.publishInstallersAndChecksums }}
+            /p:InstallersTargetStaticFeed=$(InstallersBlobFeedUrl)
+            /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
+            /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
+            /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
+            ${{ parameters.artifactsPublishingAdditionalParameters }}
+
+      - task: NuGetCommand@2
+        displayName: Publish Packages to AzDO Feed
+        condition: contains(variables['TargetAzDOFeed'], 'pkgs.visualstudio.com')
+        inputs:
+          command: push
+          vstsFeed: $(AzDoFeedName)
+          packagesToPush: $(Build.ArtifactStagingDirectory)\PackageArtifacts\*.nupkg
+          publishVstsFeed: $(AzDoFeedName)
+
+      - task: PowerShell@2
+        displayName: Publish Blobs to AzDO Feed
+        inputs:
+          filePath: $(Build.SourcesDirectory)/eng/common/post-build/publish-blobs-to-azdo.ps1
+          arguments: -FeedName $(AzDoFeedName)
+            -SourceFolderCollection $(Build.ArtifactStagingDirectory)/BlobArtifacts/
+            -PersonalAccessToken $(dn-bot-dnceng-unviersal-packages-rw)
+        enabled: false
+
+
+- stage: NetCore_Dev31_Publish_Validation
+  displayName: .NET Core 3.1 Dev Publish Validation
+  variables:
+    - template: ../common-variables.yml
+  jobs:
+  - template: ../setup-maestro-vars.yml
+
+  - ${{ if eq(parameters.enableSymbolValidation, 'true') }}:
+    - job:
+      displayName: Symbol Availability
+      dependsOn: setupMaestroVars
+      condition: contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.PublicDevRelease_31_Channel_Id))
+      pool:
+        vmImage: 'windows-2019'
+      steps:
+        - task: DownloadBuildArtifacts@0
+          displayName: Download Package Artifacts
+          inputs:
+            buildType: current
+            artifactName: PackageArtifacts
+
+        - task: PowerShell@2
+          displayName: Check Symbol Availability
+          inputs:
+            filePath: $(Build.SourcesDirectory)/eng/common/post-build/symbols-validation.ps1
+            arguments: -InputPath $(Build.ArtifactStagingDirectory)/PackageArtifacts/ -ExtractPath $(Agent.BuildDirectory)/Temp/ -DotnetSymbolVersion $(SymbolToolVersion)
+
+  - template: ../darc-gather-drop.yml
+    parameters:
+      ChannelId: ${{ variables.PublicDevRelease_31_Channel_Id }}
+
+  - template: ../promote-build.yml
+    parameters:
+      ChannelId: ${{ variables.PublicDevRelease_31_Channel_Id }}
diff --git a/eng/common/templates/post-build/channels/netcore-dev-5.yml b/eng/common/templates/post-build/channels/netcore-dev-5.yml
index 812def3154..584185c2a7 100644
--- a/eng/common/templates/post-build/channels/netcore-dev-5.yml
+++ b/eng/common/templates/post-build/channels/netcore-dev-5.yml
@@ -9,7 +9,7 @@ stages:
   dependsOn: validate
   variables:
     - template: ../common-variables.yml
-  displayName: .NET Core 5 Dev Channel
+  displayName: .NET Core 5 Dev Publishing
   jobs:
   - template: ../setup-maestro-vars.yml
 
@@ -39,8 +39,8 @@ stages:
         inputs:
           filePath: eng\common\sdk-task.ps1
           arguments: -task PublishToSymbolServers -restore -msbuildEngine dotnet
-            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat) 
-            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat) 
+            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat)
+            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat)
             /p:PDBArtifactsDirectory='$(Build.ArtifactStagingDirectory)/PDBArtifacts/'
             /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
             /p:SymbolPublishingExclusionsFile='$(Build.SourcesDirectory)/eng/SymbolPublishingExclusionsFile.txt'
@@ -85,7 +85,7 @@ stages:
           AZURE_DEVOPS_EXT_PAT: $(dn-bot-dnceng-unviersal-packages-rw)
         inputs:
           filePath: eng\common\sdk-task.ps1
-          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet 
+          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet
             /p:ChannelId=$(NetCore_5_Dev_Channel_Id)
             /p:ArtifactsCategory=$(_DotNetArtifactsCategory)
             /p:IsStableBuild=$(IsStableBuild)
@@ -93,15 +93,15 @@ stages:
             /p:RepositoryName=$(Build.Repository.Name)
             /p:CommitSha=$(Build.SourceVersion)
             /p:NugetPath=$(Agent.BuildDirectory)\Nuget\NuGet.exe
-            /p:AzdoTargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)' 
-            /p:TargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)' 
-            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)' 
-            /p:BARBuildId=$(BARBuildId) 
-            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)' 
-            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)' 
-            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/' 
-            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/' 
-            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)/PackageArtifacts/' 
+            /p:AzdoTargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)'
+            /p:TargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)'
+            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)'
+            /p:BARBuildId=$(BARBuildId)
+            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)'
+            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)'
+            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
+            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)/PackageArtifacts/'
             /p:Configuration=Release
             /p:InstallersTargetStaticFeed=$(InstallersBlobFeedUrl)
             /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
@@ -109,7 +109,7 @@ stages:
             /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
             /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
             ${{ parameters.artifactsPublishingAdditionalParameters }}
-        
+
       - task: NuGetCommand@2
         displayName: Publish Packages to AzDO Feed
         condition: contains(variables['TargetAzDOFeed'], 'pkgs.visualstudio.com')
@@ -123,16 +123,16 @@ stages:
         displayName: Publish Blobs to AzDO Feed
         inputs:
           filePath: $(Build.SourcesDirectory)/eng/common/post-build/publish-blobs-to-azdo.ps1
-          arguments: -FeedName $(AzDoFeedName) 
+          arguments: -FeedName $(AzDoFeedName)
             -SourceFolderCollection $(Build.ArtifactStagingDirectory)/BlobArtifacts/
             -PersonalAccessToken $(dn-bot-dnceng-unviersal-packages-rw)
         enabled: false
 
 
-- stage: NetCore_Dev5_PublishValidation
-  displayName: Publish Validation
+- stage: NetCore_Dev5_Publish_Validation
+  displayName: .NET Core 5 Dev Publish Validation
   variables:
-    - template: ../common-variables.yml  
+    - template: ../common-variables.yml
   jobs:
   - template: ../setup-maestro-vars.yml
 
@@ -160,6 +160,6 @@ stages:
     parameters:
       ChannelId: ${{ variables.NetCore_5_Dev_Channel_Id }}
 
-  - template: ../promote-build.yml	
-    parameters:	
+  - template: ../promote-build.yml
+    parameters:
       ChannelId: ${{ variables.NetCore_5_Dev_Channel_Id }}
diff --git a/eng/common/templates/post-build/channels/internal-servicing.yml b/eng/common/templates/post-build/channels/netcore-internal-30.yml
index 4ca36358d9..8bf88fd49e 100644
--- a/eng/common/templates/post-build/channels/internal-servicing.yml
+++ b/eng/common/templates/post-build/channels/netcore-internal-30.yml
@@ -4,11 +4,11 @@ parameters:
   artifactsPublishingAdditionalParameters: ''
 
 stages:
-- stage: IS_Publish
+- stage: NetCore_30_Internal_Servicing_Publishing
   dependsOn: validate
   variables:
     - template: ../common-variables.yml
-  displayName: Internal Servicing
+  displayName: .NET Core 3.0 Internal Servicing Publishing
   jobs:
   - template: ../setup-maestro-vars.yml
 
@@ -38,8 +38,8 @@ stages:
         inputs:
           filePath: eng\common\sdk-task.ps1
           arguments: -task PublishToSymbolServers -restore -msbuildEngine dotnet
-            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat) 
-            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat) 
+            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat)
+            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat)
             /p:PDBArtifactsDirectory='$(Build.ArtifactStagingDirectory)/PDBArtifacts/'
             /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
             /p:SymbolPublishingExclusionsFile='$(Build.SourcesDirectory)/eng/SymbolPublishingExclusionsFile.txt'
@@ -84,7 +84,7 @@ stages:
           AZURE_DEVOPS_EXT_PAT: $(dn-bot-dnceng-unviersal-packages-rw)
         inputs:
           filePath: eng\common\sdk-task.ps1
-          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet 
+          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet
             /p:ChannelId=$(InternalServicing_30_Channel_Id)
             /p:IsStableBuild=$(IsStableBuild)
             /p:IsInternalBuild=$(IsInternalBuild)
@@ -95,15 +95,15 @@ stages:
             /p:AzureDevOpsFeedsBaseUrl=$(dotnetfeed-internal-private-feed-url)
             /p:StaticInternalFeed=$(dotnetfeed-internal-nonstable-feed-url)
             /p:NugetPath=$(Agent.BuildDirectory)\Nuget\NuGet.exe
-            /p:BARBuildId=$(BARBuildId) 
-            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)' 
-            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)' 
-            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/' 
-            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)\BlobArtifacts' 
-            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)\PackageArtifacts' 
-            /p:Configuration=Release 
+            /p:BARBuildId=$(BARBuildId)
+            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)'
+            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)'
+            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)\BlobArtifacts'
+            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)\PackageArtifacts'
+            /p:Configuration=Release
             ${{ parameters.artifactsPublishingAdditionalParameters }}
-        
+
       - task: NuGetCommand@2
         displayName: Publish Packages to AzDO Feed
         condition: contains(variables['TargetAzDOFeed'], 'pkgs.visualstudio.com')
@@ -117,7 +117,7 @@ stages:
         displayName: Publish Blobs to AzDO Feed
         inputs:
           filePath: $(Build.SourcesDirectory)/eng/common/post-build/publish-blobs-to-azdo.ps1
-          arguments: -FeedName $(AzDoFeedName) 
+          arguments: -FeedName $(AzDoFeedName)
             -SourceFolderCollection $(Build.ArtifactStagingDirectory)/BlobArtifacts/
             -PersonalAccessToken $(dn-bot-dnceng-unviersal-packages-rw)
         enabled: false
@@ -125,11 +125,11 @@ stages:
       - template: ../trigger-subscription.yml
         parameters:
           ChannelId: ${{ variables.InternalServicing_30_Channel_Id }}
-        
-- stage: IS_PublishValidation
-  displayName: Publish Validation
+
+- stage: NetCore_30_Internal_Servicing_Publish_Validation
+  displayName: .NET Core 3.0 Internal Servicing Publish Validation
   variables:
-    - template: ../common-variables.yml  
+    - template: ../common-variables.yml
   jobs:
   - template: ../setup-maestro-vars.yml
 
diff --git a/eng/common/templates/post-build/channels/public-release.yml b/eng/common/templates/post-build/channels/netcore-release-30.yml
index 7ec1f89c08..dc9541d9ec 100644
--- a/eng/common/templates/post-build/channels/public-release.yml
+++ b/eng/common/templates/post-build/channels/netcore-release-30.yml
@@ -4,11 +4,11 @@ parameters:
   artifactsPublishingAdditionalParameters: ''
 
 stages:
-- stage: PubRel_Publish
+- stage: NetCore_Release30_Publish
   dependsOn: validate
   variables:
     - template: ../common-variables.yml
-  displayName: Public Release
+  displayName: .NET Core 3.0 Release Publishing
   jobs:
   - template: ../setup-maestro-vars.yml
 
@@ -38,8 +38,8 @@ stages:
         inputs:
           filePath: eng\common\sdk-task.ps1
           arguments: -task PublishToSymbolServers -restore -msbuildEngine dotnet
-            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat) 
-            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat) 
+            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat)
+            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat)
             /p:PDBArtifactsDirectory='$(Build.ArtifactStagingDirectory)/PDBArtifacts/'
             /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
             /p:SymbolPublishingExclusionsFile='$(Build.SourcesDirectory)/eng/SymbolPublishingExclusionsFile.txt'
@@ -84,27 +84,27 @@ stages:
           AZURE_DEVOPS_EXT_PAT: $(dn-bot-dnceng-unviersal-packages-rw)
         inputs:
           filePath: eng\common\sdk-task.ps1
-          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet 
+          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet
             /p:ChannelId=$(PublicRelease_30_Channel_Id)
             /p:IsStableBuild=$(IsStableBuild)
             /p:IsInternalBuild=$(IsInternalBuild)
             /p:RepositoryName=$(Build.Repository.Name)
             /p:CommitSha=$(Build.SourceVersion)
-            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)' 
+            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)'
             /p:AzureStorageAccountName=$(ProxyBackedFeedsAccountName)
             /p:AzureStorageAccountKey=$(dotnetfeed-storage-access-key-1)
             /p:AzureDevOpsFeedsBaseUrl=$(dotnetfeed-internal-private-feed-url)
             /p:StaticInternalFeed=$(dotnetfeed-internal-nonstable-feed-url)
             /p:NugetPath=$(Agent.BuildDirectory)\Nuget\NuGet.exe
-            /p:BARBuildId=$(BARBuildId) 
-            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)' 
-            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)' 
-            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/' 
-            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)\BlobArtifacts' 
-            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)\PackageArtifacts' 
-            /p:Configuration=Release 
+            /p:BARBuildId=$(BARBuildId)
+            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)'
+            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)'
+            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)\BlobArtifacts'
+            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)\PackageArtifacts'
+            /p:Configuration=Release
             ${{ parameters.artifactsPublishingAdditionalParameters }}
-        
+
       - task: NuGetCommand@2
         displayName: Publish Packages to AzDO Feed
         condition: contains(variables['TargetAzDOFeed'], 'pkgs.visualstudio.com')
@@ -118,7 +118,7 @@ stages:
         displayName: Publish Blobs to AzDO Feed
         inputs:
           filePath: $(Build.SourcesDirectory)/eng/common/post-build/publish-blobs-to-azdo.ps1
-          arguments: -FeedName $(AzDoFeedName) 
+          arguments: -FeedName $(AzDoFeedName)
             -SourceFolderCollection $(Build.ArtifactStagingDirectory)/BlobArtifacts/
             -PersonalAccessToken $(dn-bot-dnceng-unviersal-packages-rw)
         enabled: false
@@ -127,10 +127,10 @@ stages:
         parameters:
           ChannelId: ${{ variables.PublicRelease_30_Channel_Id }}
 
-- stage: PubRel_PublishValidation
-  displayName: Publish Validation
+- stage: NetCore_Release30_Publish_Validation
+  displayName: .NET Core 3.0 Release Publish Validation
   variables:
-    - template: ../common-variables.yml  
+    - template: ../common-variables.yml
   jobs:
   - template: ../setup-maestro-vars.yml
 
@@ -138,7 +138,8 @@ stages:
     - job:
       displayName: Symbol Availability
       dependsOn: setupMaestroVars
-      condition: contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.PublicRelease_30_Channel_Id))
+      condition: or(contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.PublicRelease_30_Channel_Id)),
+                    contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.PublicRelease_31_Channel_Id)))
       pool:
         vmImage: 'windows-2019'
       steps:
diff --git a/eng/common/templates/post-build/channels/netcore-release-31.yml b/eng/common/templates/post-build/channels/netcore-release-31.yml
new file mode 100644
index 0000000000..4dcf4ba9c8
--- /dev/null
+++ b/eng/common/templates/post-build/channels/netcore-release-31.yml
@@ -0,0 +1,160 @@
+parameters:
+  enableSymbolValidation: true
+  symbolPublishingAdditionalParameters: ''
+  artifactsPublishingAdditionalParameters: ''
+
+stages:
+- stage: NetCore_Release31_Publish
+  dependsOn: validate
+  variables:
+    - template: ../common-variables.yml
+  displayName: .NET Core 3.1 Release Publishing
+  jobs:
+  - template: ../setup-maestro-vars.yml
+
+  - job:
+    displayName: Symbol Publishing
+    dependsOn: setupMaestroVars
+    condition: contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.PublicRelease_31_Channel_Id))
+    variables:
+      - group: DotNet-Symbol-Server-Pats
+    pool:
+      vmImage: 'windows-2019'
+    steps:
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Blob Artifacts
+        inputs:
+          artifactName: 'BlobArtifacts'
+        continueOnError: true
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download PDB Artifacts
+        inputs:
+          artifactName: 'PDBArtifacts'
+        continueOnError: true
+
+      - task: PowerShell@2
+        displayName: Publish
+        inputs:
+          filePath: eng\common\sdk-task.ps1
+          arguments: -task PublishToSymbolServers -restore -msbuildEngine dotnet
+            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat)
+            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat)
+            /p:PDBArtifactsDirectory='$(Build.ArtifactStagingDirectory)/PDBArtifacts/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
+            /p:SymbolPublishingExclusionsFile='$(Build.SourcesDirectory)/eng/SymbolPublishingExclusionsFile.txt'
+            /p:Configuration=Release
+            ${{ parameters.symbolPublishingAdditionalParameters }}
+
+  - job: publish_assets
+    displayName: Publish Assets
+    dependsOn: setupMaestroVars
+    variables:
+      - group: DotNet-Blob-Feed
+      - group: AzureDevOps-Artifact-Feeds-Pats
+      - name: BARBuildId
+        value: $[ dependencies.setupMaestroVars.outputs['setReleaseVars.BARBuildId'] ]
+      - name: IsStableBuild
+        value: $[ dependencies.setupMaestroVars.outputs['setReleaseVars.IsStableBuild'] ]
+    condition: contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.PublicRelease_31_Channel_Id))
+    pool:
+      vmImage: 'windows-2019'
+    steps:
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Package Artifacts
+        inputs:
+          buildType: current
+          artifactName: PackageArtifacts
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Blob Artifacts
+        inputs:
+          buildType: current
+          artifactName: BlobArtifacts
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Asset Manifests
+        inputs:
+          buildType: current
+          artifactName: AssetManifests
+
+      - task: PowerShell@2
+        displayName: Publish
+        env:
+          AZURE_DEVOPS_EXT_PAT: $(dn-bot-dnceng-unviersal-packages-rw)
+        inputs:
+          filePath: eng\common\sdk-task.ps1
+          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet
+            /p:ChannelId=$(PublicRelease_31_Channel_Id)
+            /p:IsStableBuild=$(IsStableBuild)
+            /p:IsInternalBuild=$(IsInternalBuild)
+            /p:RepositoryName=$(Build.Repository.Name)
+            /p:CommitSha=$(Build.SourceVersion)
+            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)'
+            /p:AzureStorageAccountName=$(ProxyBackedFeedsAccountName)
+            /p:AzureStorageAccountKey=$(dotnetfeed-storage-access-key-1)
+            /p:AzureDevOpsFeedsBaseUrl=$(dotnetfeed-internal-private-feed-url)
+            /p:StaticInternalFeed=$(dotnetfeed-internal-nonstable-feed-url)
+            /p:NugetPath=$(Agent.BuildDirectory)\Nuget\NuGet.exe
+            /p:BARBuildId=$(BARBuildId)
+            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)'
+            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)'
+            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)\BlobArtifacts'
+            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)\PackageArtifacts'
+            /p:Configuration=Release
+            ${{ parameters.artifactsPublishingAdditionalParameters }}
+
+      - task: NuGetCommand@2
+        displayName: Publish Packages to AzDO Feed
+        condition: contains(variables['TargetAzDOFeed'], 'pkgs.visualstudio.com')
+        inputs:
+          command: push
+          vstsFeed: $(AzDoFeedName)
+          packagesToPush: $(Build.ArtifactStagingDirectory)\PackageArtifacts\*.nupkg
+          publishVstsFeed: $(AzDoFeedName)
+
+      - task: PowerShell@2
+        displayName: Publish Blobs to AzDO Feed
+        inputs:
+          filePath: $(Build.SourcesDirectory)/eng/common/post-build/publish-blobs-to-azdo.ps1
+          arguments: -FeedName $(AzDoFeedName)
+            -SourceFolderCollection $(Build.ArtifactStagingDirectory)/BlobArtifacts/
+            -PersonalAccessToken $(dn-bot-dnceng-unviersal-packages-rw)
+        enabled: false
+
+      - template: ../trigger-subscription.yml
+        parameters:
+          ChannelId: ${{ variables.PublicRelease_31_Channel_Id }}
+
+- stage: NetCore_Release31_Publish_Validation
+  displayName: .NET Core 3.1 Release Publish Validation
+  variables:
+    - template: ../common-variables.yml
+  jobs:
+  - template: ../setup-maestro-vars.yml
+
+  - ${{ if eq(parameters.enableSymbolValidation, 'true') }}:
+    - job:
+      displayName: Symbol Availability
+      dependsOn: setupMaestroVars
+      condition: or(contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.PublicRelease_31_Channel_Id)),
+                    contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.PublicRelease_31_Channel_Id)))
+      pool:
+        vmImage: 'windows-2019'
+      steps:
+        - task: DownloadBuildArtifacts@0
+          displayName: Download Package Artifacts
+          inputs:
+            buildType: current
+            artifactName: PackageArtifacts
+
+        - task: PowerShell@2
+          displayName: Check Symbol Availability
+          inputs:
+            filePath: $(Build.SourcesDirectory)/eng/common/post-build/symbols-validation.ps1
+            arguments: -InputPath $(Build.ArtifactStagingDirectory)/PackageArtifacts/ -ExtractPath $(Agent.BuildDirectory)/Temp/ -DotnetSymbolVersion $(SymbolToolVersion)
+
+  - template: ../promote-build.yml
+    parameters:
+      ChannelId: ${{ variables.PublicRelease_31_Channel_Id }}
diff --git a/eng/common/templates/post-build/channels/netcore-tools-latest.yml b/eng/common/templates/post-build/channels/netcore-tools-latest.yml
index c2d2076730..4d9f197d43 100644
--- a/eng/common/templates/post-build/channels/netcore-tools-latest.yml
+++ b/eng/common/templates/post-build/channels/netcore-tools-latest.yml
@@ -3,13 +3,15 @@ parameters:
   symbolPublishingAdditionalParameters: ''
   artifactsPublishingAdditionalParameters: ''
   publishInstallersAndChecksums: false
+  publishToAzureDevOpsFeeds: false
+  azureDevOpsToolsFeed: 'https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json'
 
 stages:
 - stage: NetCore_Tools_Latest_Publish
   dependsOn: validate
   variables:
     - template: ../common-variables.yml
-  displayName: .NET Tools - Latest
+  displayName: .NET Tools - Latest Publishing
   jobs:
   - template: ../setup-maestro-vars.yml
 
@@ -39,8 +41,8 @@ stages:
         inputs:
           filePath: eng\common\sdk-task.ps1
           arguments: -task PublishToSymbolServers -restore -msbuildEngine dotnet
-            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat) 
-            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat) 
+            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat)
+            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat)
             /p:PDBArtifactsDirectory='$(Build.ArtifactStagingDirectory)/PDBArtifacts/'
             /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
             /p:SymbolPublishingExclusionsFile='$(Build.SourcesDirectory)/eng/SymbolPublishingExclusionsFile.txt'
@@ -85,7 +87,7 @@ stages:
           AZURE_DEVOPS_EXT_PAT: $(dn-bot-dnceng-unviersal-packages-rw)
         inputs:
           filePath: eng\common\sdk-task.ps1
-          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet 
+          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet
             /p:ChannelId=$(NetCore_Tools_Latest_Channel_Id)
             /p:ArtifactsCategory=$(_DotNetArtifactsCategory)
             /p:IsStableBuild=$(IsStableBuild)
@@ -93,23 +95,28 @@ stages:
             /p:RepositoryName=$(Build.Repository.Name)
             /p:CommitSha=$(Build.SourceVersion)
             /p:NugetPath=$(Agent.BuildDirectory)\Nuget\NuGet.exe
-            /p:AzdoTargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)' 
-            /p:TargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)' 
-            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)' 
-            /p:BARBuildId=$(BARBuildId) 
-            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)' 
-            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)' 
-            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/' 
-            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/' 
-            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)/PackageArtifacts/' 
+            /p:AzdoTargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)'
+            /p:TargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)'
+            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)'
+            /p:BARBuildId=$(BARBuildId)
+            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)'
+            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)'
+            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
+            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)/PackageArtifacts/'
             /p:Configuration=Release
             /p:InstallersTargetStaticFeed=$(InstallersBlobFeedUrl)
             /p:PublishInstallersAndChecksums=${{ parameters.publishInstallersAndChecksums }}
             /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
             /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
             /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
+            /p:PublishToAzureDevOpsNuGetFeeds=${{ parameters.publishToAzureDevOpsFeeds }}
+            /p:AzureDevOpsStaticShippingFeed=${{ parameters.azureDevOpsToolsFeed }}
+            /p:AzureDevOpsStaticShippingFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
+            /p:AzureDevOpsStaticTransportFeed=${{ parameters.azureDevOpsToolsFeed }}
+            /p:AzureDevOpsStaticTransportFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)
             ${{ parameters.artifactsPublishingAdditionalParameters }}
-        
+
       - task: NuGetCommand@2
         displayName: Publish Packages to AzDO Feed
         condition: contains(variables['TargetAzDOFeed'], 'pkgs.visualstudio.com')
@@ -123,16 +130,16 @@ stages:
         displayName: Publish Blobs to AzDO Feed
         inputs:
           filePath: $(Build.SourcesDirectory)/eng/common/post-build/publish-blobs-to-azdo.ps1
-          arguments: -FeedName $(AzDoFeedName) 
+          arguments: -FeedName $(AzDoFeedName)
             -SourceFolderCollection $(Build.ArtifactStagingDirectory)/BlobArtifacts/
             -PersonalAccessToken $(dn-bot-dnceng-unviersal-packages-rw)
         enabled: false
 
 
 - stage: NetCore_Tools_Latest_PublishValidation
-  displayName: Publish Validation
+  displayName: .NET Tools - Latest Publish Validation
   variables:
-    - template: ../common-variables.yml  
+    - template: ../common-variables.yml
   jobs:
   - template: ../setup-maestro-vars.yml
 
@@ -160,6 +167,6 @@ stages:
     parameters:
       ChannelId: ${{ variables.NetCore_Tools_Latest_Channel_Id }}
 
-  - template: ../promote-build.yml	
-    parameters:	
+  - template: ../promote-build.yml
+    parameters:
       ChannelId: ${{ variables.NetCore_Tools_Latest_Channel_Id }}
diff --git a/eng/common/templates/post-build/channels/public-validation-release.yml b/eng/common/templates/post-build/channels/public-validation-release.yml
index 12124d6215..e306fa87bf 100644
--- a/eng/common/templates/post-build/channels/public-validation-release.yml
+++ b/eng/common/templates/post-build/channels/public-validation-release.yml
@@ -1,13 +1,15 @@
 parameters:
   artifactsPublishingAdditionalParameters: ''
   publishInstallersAndChecksums: false
+  publishToAzureDevOpsFeeds: false
+  azureDevOpsToolsFeed: 'https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json'
 
 stages:
 - stage: PVR_Publish
   dependsOn: validate
   variables:
     - template: ../common-variables.yml
-  displayName: Validation Channel
+  displayName: .NET Tools - Validation Publishing
   jobs:
   - template: ../setup-maestro-vars.yml
 
@@ -49,7 +51,7 @@ stages:
           AZURE_DEVOPS_EXT_PAT: $(dn-bot-dnceng-unviersal-packages-rw)
         inputs:
           filePath: eng\common\sdk-task.ps1
-          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet 
+          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet
             /p:ChannelId=$(PublicValidationRelease_30_Channel_Id)
             /p:ArtifactsCategory=$(_DotNetValidationArtifactsCategory)
             /p:IsStableBuild=$(IsStableBuild)
@@ -57,21 +59,26 @@ stages:
             /p:RepositoryName=$(Build.Repository.Name)
             /p:CommitSha=$(Build.SourceVersion)
             /p:NugetPath=$(Agent.BuildDirectory)\Nuget\NuGet.exe
-            /p:AzdoTargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)' 
-            /p:TargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)' 
-            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)' 
-            /p:BARBuildId=$(BARBuildId) 
-            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)' 
-            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)' 
-            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/' 
-            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)\BlobArtifacts' 
-            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)\PackageArtifacts' 
+            /p:AzdoTargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)'
+            /p:TargetFeedPAT='$(dn-bot-dnceng-unviersal-packages-rw)'
+            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)'
+            /p:BARBuildId=$(BARBuildId)
+            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)'
+            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)'
+            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)\BlobArtifacts'
+            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)\PackageArtifacts'
             /p:Configuration=Release
             /p:InstallersTargetStaticFeed=$(InstallersBlobFeedUrl)
             /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
             /p:PublishInstallersAndChecksums=${{ parameters.publishInstallersAndChecksums }}
             /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
             /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
+            /p:PublishToAzureDevOpsNuGetFeeds=${{ parameters.publishToAzureDevOpsFeeds }}
+            /p:AzureDevOpsStaticShippingFeed=${{ parameters.azureDevOpsToolsFeed }}
+            /p:AzureDevOpsStaticShippingFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
+            /p:AzureDevOpsStaticTransportFeed=${{ parameters.azureDevOpsToolsFeed }}
+            /p:AzureDevOpsStaticTransportFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
             ${{ parameters.artifactsPublishingAdditionalParameters }}
 
       - task: NuGetCommand@2
@@ -87,14 +94,14 @@ stages:
         displayName: Publish Blobs to AzDO Feed
         inputs:
           filePath: $(Build.SourcesDirectory)/eng/common/post-build/publish-blobs-to-azdo.ps1
-          arguments: -FeedName $(AzDoFeedName) 
+          arguments: -FeedName $(AzDoFeedName)
             -SourceFolderCollection $(Build.ArtifactStagingDirectory)/BlobArtifacts/
             -PersonalAccessToken $(dn-bot-dnceng-unviersal-packages-rw)
         enabled: false
 
 
 - stage: PVR_PublishValidation
-  displayName: Publish Validation
+  displayName: .NET Tools - Validation Publish Validation
   variables:
     - template: ../common-variables.yml
   jobs:
@@ -104,6 +111,6 @@ stages:
     parameters:
       ChannelId: ${{ variables.PublicValidationRelease_30_Channel_Id }}
 
-  - template: ../promote-build.yml	
-    parameters:	
+  - template: ../promote-build.yml
+    parameters:
       ChannelId: ${{ variables.PublicValidationRelease_30_Channel_Id }}
diff --git a/eng/common/templates/post-build/common-variables.yml b/eng/common/templates/post-build/common-variables.yml
index 7b3fdb1361..49712b3a60 100644
--- a/eng/common/templates/post-build/common-variables.yml
+++ b/eng/common/templates/post-build/common-variables.yml
@@ -6,6 +6,10 @@ variables:
   - name: PublicDevRelease_30_Channel_Id
     value: 3
 
+  # .NET Core 3.1 Dev
+  - name: PublicDevRelease_31_Channel_Id
+    value: 260
+
   # .NET Core 5 Dev
   - name: NetCore_5_Dev_Channel_Id
     value: 131
@@ -26,6 +30,10 @@ variables:
   - name: PublicRelease_30_Channel_Id
     value: 19
 
+  # .NET Core 3.1 Release
+  - name: PublicRelease_31_Channel_Id
+    value: 129
+
   # Whether the build is internal or not
   - name: IsInternalBuild
     value: ${{ and(ne(variables['System.TeamProject'], 'public'), contains(variables['Build.SourceBranch'], 'internal')) }}
diff --git a/eng/common/templates/post-build/post-build.yml b/eng/common/templates/post-build/post-build.yml
index 34667b6c09..ae376b7747 100644
--- a/eng/common/templates/post-build/post-build.yml
+++ b/eng/common/templates/post-build/post-build.yml
@@ -4,6 +4,7 @@ parameters:
   enableSymbolValidation: false
   enableNugetValidation: true
   publishInstallersAndChecksums: false
+  enableAzDONuGetFeeds: true
   SDLValidationParameters:
     enable: false
     continueOnError: false
@@ -102,7 +103,14 @@ stages:
     artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
     publishInstallersAndChecksums: ${{ parameters.publishInstallersAndChecksums }}
 
-- template: \eng\common\templates\post-build\channels\public-dev-release.yml
+- template: \eng\common\templates\post-build\channels\netcore-dev-30.yml
+  parameters:
+    enableSymbolValidation: ${{ parameters.enableSymbolValidation }}
+    symbolPublishingAdditionalParameters: ${{ parameters.symbolPublishingAdditionalParameters }}
+    artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
+    publishInstallersAndChecksums: ${{ parameters.publishInstallersAndChecksums }}
+
+- template: \eng\common\templates\post-build\channels\netcore-dev-31.yml
   parameters:
     enableSymbolValidation: ${{ parameters.enableSymbolValidation }}
     symbolPublishingAdditionalParameters: ${{ parameters.symbolPublishingAdditionalParameters }}
@@ -115,18 +123,25 @@ stages:
     symbolPublishingAdditionalParameters: ${{ parameters.symbolPublishingAdditionalParameters }}
     artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
     publishInstallersAndChecksums: ${{ parameters.publishInstallersAndChecksums }}
+    enableAzDONuGetFeeds: ${{ parameters.enableAzDONuGetFeeds }}
 
 - template: \eng\common\templates\post-build\channels\public-validation-release.yml
   parameters:
     artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
     publishInstallersAndChecksums: ${{ parameters.publishInstallersAndChecksums }}
+    enableAzDONuGetFeeds: ${{ parameters.enableAzDONuGetFeeds }}
+
+- template: \eng\common\templates\post-build\channels\netcore-release-30.yml
+  parameters:
+    symbolPublishingAdditionalParameters: ${{ parameters.symbolPublishingAdditionalParameters }}
+    artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
 
-- template: \eng\common\templates\post-build\channels\public-release.yml
+- template: \eng\common\templates\post-build\channels\netcore-release-31.yml
   parameters:
     symbolPublishingAdditionalParameters: ${{ parameters.symbolPublishingAdditionalParameters }}
     artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
 
-- template: \eng\common\templates\post-build\channels\internal-servicing.yml
+- template: \eng\common\templates\post-build\channels\netcore-internal-30.yml
   parameters:
     symbolPublishingAdditionalParameters: ${{ parameters.symbolPublishingAdditionalParameters }}
     artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
diff --git a/global.json b/global.json
index e8af520741..b7ab2fa772 100644
--- a/global.json
+++ b/global.json
@@ -7,8 +7,8 @@
     "python": "2.7.15"
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.19453.5",
-    "Microsoft.DotNet.Helix.Sdk": "2.0.0-beta.19453.5",
+    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.19454.31",
+    "Microsoft.DotNet.Helix.Sdk": "2.0.0-beta.19454.31",
     "Microsoft.Build.NoTargets": "1.0.53",
     "Microsoft.Build.Traversal": "2.0.2"
   }